Appearance：Yellow or orange yellow crystalline powder
Identification：Positive Assay 73.0-79.0%
Specific rotation：+37.0~ +42.0 o
PH：5.0-6.5
Loss on drying：7.5% max
Lumiflavine：0.025% max
Free riboflavine：6.0% max
Riboflavine diphosphate：6.0% max
Inorganic phosphate：1.0% max
Residue on ignition：25.0% max
Volatile organic impurities(mg/kg)：Meets the requirement
